Battery pack



FIG. 1 is a top-front perspective view of the design for a battery pack;

FIG. 2 is a bottom-rear perspective view thereof;

FIG. 3 is a left-side view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown in the drawings are included for the purpose ofillustrating environmental structure and form no part of the claimeddesign.

CLAIM The ornamental design for a battery pack, as shown and described.